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Mysterious Stars Surround Andromeda's Black Hole

UltimaGuy writes to tell us that Yahoo is running a story about a recent discovery that shows the source of strange blue light coming from the center of the Andromeda galaxy. The light is actually a cluster of stars circling the galaxy's central black hole with immense orbital velocity. From the article: "Such frenetic activity was thought to prevent star formation. Stars form when a knot of gas and dust collapses under its own gravity."

26 of 341 comments (clear)

  1. Duh. by ackthpt · · Score: 5, Funny
    strange blue light coming from the center of the Andromeda galaxy.

    It's the resurgence of K-Mart!

    --

    A feeling of having made the same mistake before: Deja Foobar
    1. Re:Duh. by Profane+MuthaFucka · · Score: 4, Funny

      The Sears/KMart merger caused the resulting mass of "suck" to collapse into a gigantic black hole, composed of pure suckiness. The proposed Northwest/Delta airline merger will do a similar thing, providing a rare opportunity to observe a black hole of suckiness in the process of formation.

      --
      Fascism trolls keeping me up every night. When I starts a preachin', he HITS ME WITH HIS REICH!
  2. Cold fucking cathode by Anonymous Coward · · Score: 5, Funny

    Stinking ricers have taken over a whole galaxy. If you think galactic undercarriage lighting is bad, wait till you hear them blasting that galactic bass late at night.

  3. Elements past iron by benhocking · · Score: 4, Informative

    Elements past iron can only be created in a supernova explosion. Google on "supernova elements" for more information. Of course, the element synthesis during a supernova explosion is due to fusion, but I'm not sure one could call it "star fusion".

    --
    Ben Hocking
    Need a professional organizer?
    1. Re:Elements past iron by MaskedSlacker · · Score: 5, Informative

      Actually its neutron accretion that produces elements heavier than iron, not fusion. Iron disintegrates at temperatures lower than what it will fuse at.

    2. Re:Elements past iron by MaskedSlacker · · Score: 5, Informative

      No, because hydrogen is a single proton, not a single neutron. I forget the exact mechanics of neutron accretion, as its not my field of direct study, but it occurs in two forms, the r-process (rapid) and the s-process(slow) (we physicists are not known for being creative with names). The r-process occurs in supernovae when heavy nuclei are bombarded by many neutrons, ad rather than splitting the target nuclei, the neutrons stick (at the same time the nuclei are radiating particles away, but not as fast as they are gaining them). Once the process stops, the new, super neutron rich nuclei give off beta radiation (changing neturons into protons) until they reach a stable configuration. The s-process occurs in large, but otherwise stable stars. This process however only produces elements as heavy as lead. Anything heavier is produced by the r-process.

  4. An escaping star?? HA! by lightyear4 · · Score: 4, Informative

    Wouldnt matter too much...our Milky Way and Andromeda are on a slow collision course anyway - by the time an ejected star got here, the rest of the galaxy would be right behind it. But no need to go hide in a cave just yet, we've still got about 3 billion years.

    1. Re:An escaping star?? HA! by Intron · · Score: 5, Funny

      FEMA announced plans to start working on the problem in 3.1 billion years.

      --
      Intron: the portion of DNA which expresses nothing useful.
  5. Get it right.. by beldraen · · Score: 5, Insightful
    Stars form when a knot of gas and dust collapses under its own gravity.

    No... Stars form however they damn well please. Our current models suggest it is done under their own gravity, but our models are not reality. They are our understanding of reality and are modified or thrown out when we find our understanding is wrong. The universe is always right.

    P.S. Sorry, it's one of my pet pieves when someone says "that not how physics works!"
    --
    Bel, the mostly sane.. "Of course I can't see anything! I'm standing on the shoulders of idiots." -- Me
    1. Re:Get it right.. by Shadow+Wrought · · Score: 4, Insightful
      Our current models suggest it is done under their own gravity, but our models are not reality.

      Physicists see equations as a reflection of reality.
      Engineers see reality as a reflection of equations.
      Mathematicians haven't made the connection.

      --
      If brevity is the soul of wit, then how does one explain Twitter?
    2. Re:Get it right.. by ifwm · · Score: 5, Insightful

      "No... Stars form however they damn well please"

      No, stars form however the rules of the universe allow them to.

      P.S. Sorry, but it's one of my pet peeves when people anthropomorphize inanimate objects.

    3. Re:Get it right.. by Rorschach1 · · Score: 4, Funny

      Yeah, and the inanimate objects don't like it either.

    4. Re:Get it right.. by lgw · · Score: 5, Funny

      One night a physisist, and engineer, and a mathematician each awoke to a fire in their kitchen. The physisist calculated the precise amount of water necessary to extinguish the fire, measure out just that amount of water, poured it on the fire, and went back to bed. The engineer poour water on the fire till is went out, added some mor for good measure, then went back to bed. The mathematician proved that is was possible to extinguish fire with water, then went back to bed.

      --
      Socialism: a lie told by totalitarians and believed by fools.
    5. Re:Get it right.. by MajorBlunder · · Score: 5, Funny

      While the statistician was running around starting new fires because he needed more samples.

      --

      "I'm making perfect sense, you're just not keeping up."

    6. Re:Get it right.. by galen · · Score: 4, Funny

      And the software engineer refused to do anything until a second or third fire had started arguing that if the bug's not repeatable...

  6. Neato. by Pxtl · · Score: 4, Insightful

    Sounds similar to Saturn's rings. A ton of matter spread into teeny blocks in space by tidal forces, but still with enough mass to pull together into a bazillion little blobs. Perhaps the radiant matter/antimatter/energy from the black hole (I'm fuzzy on Hawking's theory on the subject) is heating the surrounding star-spray enough to light some of them?

  7. Hubble by Bonhamme+Richard · · Score: 4, Insightful
    Just another example of how valuable Hubble is.

    Its too bad we only have one giant eye in the sky...

  8. One black hole by Black+Parrot · · Score: 5, Funny


    To rule them all,
    And in the Darkness bind them.

    --
    Sheesh, evil *and* a jerk. -- Jade
  9. Well... by slobber · · Score: 5, Insightful

    IANAA, but could these stars have formed prior to being caught by the gravity of that black hole?

    --
    "You mortals are so obtuse." -Q
    1. Re:Well... by swelke · · Score: 5, Informative

      That's quite possible. If they formed in a wider orbit around the black hole, for example, they could well have been caught by tidal drag and slowly moved into lower orbits.

      The real question is how they can exist at all in such a low orbit (or, more accurately, how they can exist in such a strong gravity gradient). What happens is that if they tidal difference between the two sides of the star (the difference between the black hole's gravity at the closest edge of the star and that on the furthest edge) exceeds the star's escape velocity, matter will be able to leave the star and it just falls apart. The implication (which the Yahoo! article was too low-tech to get right) was that the stars must be very dense. A dense star will have both (a) less distance between that nearest and furthest edge and (b) a steeper gravity well for material to get out of in the first place.

      The other interesting bit is the rather close estimate of the black hole's mass. Most of the other estimates of galactic center black hole masses I've seen are based on things orbiting them far more distantly, such as 10-100 light years.

      --
      Have you ever wondered How to Take Over
  10. power center of advanced civilization by peter303 · · Score: 5, Interesting

    If it appears to be physically difficult to explain these stars, perhaps it is an artificial constuction. I'd expect an advanced extra-terrestial civilization to exploit the immense power of the galactic core black hole. Who knows what they are doing with it? Sustanence? Wormhole transport? Communication? Entertainment? Maybe one hundred infant stars whizzing around the center has something to do with this.

  11. bad explanation? by peter303 · · Score: 4, Insightful

    My explanation is almost as bad as the fundamentalists. If something complicated happens, they say God made it rather some scientific explantion. I'm just substituting advanced aliens for God.

  12. Re:Duck... by Pxtl · · Score: 4, Insightful

    what I've heard is that while galactic collisions look like all holy hell breaking loose, the stars so rarely pass actually close to each other that they never meat - it's like two clouds of sand passing through each other. The only worry is that something massive brushing within a few lightyears of our solar system might screw with the oribits.

  13. Secondary eddies by revscat · · Score: 4, Interesting
    Like most of the morons around here, I am not a physicist, but I'm going to toss and idea out there anyhoo.

    I've noticed that sometimes when dealing with spiral phenomena (hurricanes, tornadoes, whirlpools, etc.) there are secondary, much smaller spirals that are thrown off from the main body. Could this be in effect here? Could the black hole be throwing off gravitational "eddies" that cause stars to be formed?

  14. Re:Argghh by Rycross · · Score: 4, Insightful

    Well, as a religious person myself, I'll answer your question.

    Simply because saying "Its because of God," leads us to a dead end. If we attributed everything to God, then our scientific progress would be halted. In fact, you can see the results of this type of thinking in our own history. It's called the Dark Ages.

    Science has to take an agnostic stance in order to work. We have to take an agnostic stance in human knowledge in order to progress. If we depend on daddy (God) to give us all the answers, then we will never grow up.

  15. Yet another gaping hole... by shrubya · · Score: 4, Funny

    ...in the so-called "Theory" of Gravity. (what, did you think I was going to say goatse?)

    When will those fancy-pants university astrologers accept the truth of Intelligent Falling. It's in all the news, so it must be true.